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I want to delete records fro hbase table after insert few records so that my API would never have downtime to pick latest values

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I want to delete records fro hbase table after insert few records so that my API would never have downtime to pick latest values

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My API is poniting to Table1 and they are consuming data from that table.My problem is,I want to copy data from Table2 which has same schema as Table1 and I want to truncate data which is there in Table1 and I want to copy data to Table1 from Table2.With this process there should be some down time as my API will not get data from table1 in truncate and copy time.Is there any way that I can copy everyday from table2 to table1 without downtime considreing truncate table1 old data.